Stirred Tanks
Mostrando 1-12 de 13 artigos, teses e dissertações.
-
1. AN INVESTIGATION OF THE HEAT TRANSFER PERFORMANCE OF DUAL IMPROVED INTERMIG IMPELLERS IN A STIRRED TANK WITH AN INNER HEATING COIL
Abstract The heat transfer process in a stirred tank of diameter T=0.5m equipped with dual-layer improved Intermig impellers and helical coils was investigated by experiment and numerical simulation methods. The temperature field, the temperature boundary layer lateral to the coil and the heat transfer coefficient were measured at different rotational speeds
Braz. J. Chem. Eng.. Publicado em: 09/12/2019
-
2. OUTDOOR CULTIVATION OF Scenedesmus obliquus BR003 IN STIRRED TANKS BY AIRLIFT
ABSTRACT: The use of microalgae as a source of raw material for biofuel production has been highly targeted. Compared to other biological options for the capture and use of CO2, microalgae crops have the following advantages: high productivity, lack of competition with feed and food-based products, use of unproductive and non-arable land, and allowance of th
Eng. Agríc.. Publicado em: 2017-09
-
3. CONTINUOUS AND SEMICONTINUOUS REACTION SYSTEMS FOR HIGH-SOLIDS ENZYMATIC HYDROLYSIS OF LIGNOCELLULOSICS
Abstract An attractive operation strategy for the enzymatic hydrolysis of lignocellulosics results from dividing the process into three stages with complementary goals: continuous enzyme adsorption at low-solids loading (5% w/w) with recycling of the liquid phase; continuous liquefaction at high-solids content (up to 20% w/w); and, finally, continuous or sem
Braz. J. Chem. Eng.. Publicado em: 2015-12
-
4. Escalonamento de tanques condicionadores utilizados na flotação de apatita. / Scale-up of stirred tanks for reagent conditioning at apatite flotation.
Este trabalho estudou a aplicação de oito métodos clássicos de escalonamento de tanques condicionadores, testando sua validade para dois tanques de geometria semelhante, mas com diferentes volumes (V1=10 e V2=49 decímetros cúbicos). No interior dos tanques, operavam impulsores (diâmetro D1=0,078m x D2=0,132m) que exibiam três distintos desenhos (2 p�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/12/2010
-
5. Study of partition of ovomucoid protein in aqueous twophase systems and anionic or hydrophobic resins / Estudo da partição da proteína ovomucoide em sistemas aquosos bifásicos e em resinas aniônica ou hidrofóbica
In this work, the application of the liquid-liquid extraction technique with aqueous two-phase systems (ATPS) was evaluated for the separation of ovomucoid, an egg white protein. This technique is an advisable purification process applied to large scale since it provides a selective partition with high yields. The ATPS were composed by PEG 1500 and an inorga
Publicado em: 2009
-
6. Desenvolvimento de processo contínuo de copolimerização em emulsão em reator tubular. / Development of a continuous emulsion copolymerization process in a tubular reactor.
Industrial emulsion polymerization processes are usually performed in batch or semi-batch stirred tanks, or in continuous stirred tank reactors (CSTR). Continuous reactors have the advantage of being smaller and providing a better product quality control by the reduction of the batch-to-batch variations. In addition, periodical self-sustained oscillations in
Publicado em: 2008
-
7. Improving heat transfer in stirred tanks cooled by helical coils
Stirred Tank Reactors are extensively used in chemical industries. When they are used for highly exothermic reactions, jackets or coils are employed for heat removal. Internal coils can be either helical or axial and they considerably affect the flow inside the reactor because they impose an additional resistance to flow circulation. The aim of this work is
Brazilian Journal of Chemical Engineering. Publicado em: 2003-06
-
8. Estudo da purificação do àcido clavulânico utilizando processo contínuo de adsorsão. / Studies on clavulanic acid purification utilizing continuous process of adsorption.
Clavulanic acid (CA), a beta-lactam antibiotic, has been known for its commercial and therapeutic importance. This antibiotic is produced by an actinomicete, Streptomyces clavuligerus, and has a combined use with penicillins, acting as inhibitor of beta-lactamase enzymes. Due this importance, some studies on clavulanic acid production has been developed at D
Publicado em: 2003
-
9. Cromatografia IMAC : estudos de adsorção de glucagon e insulina em silica-IDA-Me2+
Glucagon is a hormone that increases blood glucose concentration and is used as a pharmaceutical product mainly in cases of hypoglycemia associated with diabetes. Given both its importance and cwrent1y high oost, improved purification processes are on demando Adsorption studies of glucagon and insulin on adsorbents of silica-IDA-Me2+ were carried out. By usi
Publicado em: 2001
-
10. Modelagem e simulação de um processo inovativo para sintese enzimatica de dextrana : verificação da aplicabilidade do sistema para processos industriais
Dextran is a polysacharide obtained fiom sucrose, a common and cheap raw material in Brazil. Its application depends on its molecular weight, that presents a large range. There are dextrans of molecular weight fiom thousands to millions of daltons. The enzymatic synthesis of dextran is possible because the enzyme used to obtain dextran is stable under large
Publicado em: 2000
-
11. Estudo da adsorção de inulinases em colunas com resinas de troca ionica : paramentros experimentais e modelagem
The inulinases are enzymes with great commercial potencial, as they hydrolise inulin producing important products for the food industry such as fructose and fructose oligomeres. The separation and purification of these enzymes, with efficiency and compatible costs, is of great importance to the development of adsorption techniques and protocols which may opt
Publicado em: 2000
-
12. Desenvolvimento de um sistema especialista para o projeto de unidades industriais de produção de alcool
In this work an expert system was developed for the design of large scale continuous fermentation units for alcohol production, using the shell PcPlus from Texas Instruments. This expert system is based on an intensive rule-based program, whose knowledge base was structured using both expert knowledge data and industrial rules of thumb, and on computer simul
Publicado em: 1995